Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Noncontrolling Interest [Member]	Treasury Stock, Common	Parent Company [Member]	Parent Company [Member] Accounting Standards Update 2016-13 [Member]	Parent Company [Member] Retained Earnings [Member]	Parent Company [Member] Retained Earnings [Member] Accounting Standards Update 2016-13 [Member]	Parent Company [Member] AOCI Attributable to Parent [Member]	Parent Company [Member] Additional Paid-in Capital [Member]	Parent Company [Member] Treasury Stock, Common
Beginning balance at Dec. 31, 2020	$ 1,140	$ 759	$ 79	$ 0	$ 0	$ 242	$ 60	$ (1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(38)	(17)	(21)						$ (38)		$ (17)		$ (21)
Effect of New Accounting Principle										$ 0		$ 0
Stock-based compensation	14					14			14					$ 14
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(6)	(4)						(2)	(6)		(4)				$ (2)
Ending balance at Dec. 31, 2021	1,098	726	58	0	0	257	60	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Noncontrolling Interest, Change in Redemption Value	(12)	(12)
Total comprehensive income (loss)	212	521	(310)						211		521		(310)
Stock-based compensation	17					17			17					17	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(4)	(5)				0		2	(4)		(5)				2
Treasury Stock, Value, Acquired, Cost Method	14							14
Ending balance at Dec. 31, 2022	1,305	1,245	(253)	0	0	274	53	(15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total, Excluding Gain on AMPS Repurchase	211
Noncontrolling Interest, Change in Redemption Value	3	3							3		3
Proceeds from Noncontrolling Interests	2						2
AMPS Impact on Stockholders Equity	(8)	1					(9)
Total comprehensive income (loss)	98	4	93						96		4		$ 93
Stock-based compensation	17					17			17					$ 17
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(5)	(8)						3	(5)		(8)				3
Treasury Stock, Value, Acquired, Cost Method	(5)							(5)	5						$ 5
Ending balance at Dec. 31, 2023	1,415	1,246	(160)	0	0	292	53	(17)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total, Excluding Gain on AMPS Repurchase	96
Noncontrolling Interest, Change in Redemption Value	$ 5	$ 5	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 5		$ 5